It is 3. Because a square root is anything times itself to make an answer. For example:
Answer:
y=7
Step-by-step explanation:
R is 4 if I'm wrong sorry
Answer:
0.01
Step-by-step explanation:
Cross multiply
18 / X = 2.4 / 28
so
18 * 28 = X (2.4)
and that becomes
504 = X * 2.4
then divide by 2.4
X = 210